Bruno, Alexander D <br/><br/>
Local Methods in nonlinear differential equation 

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 - Berlin  Springer-Verlag  1970 
 - x,348p.   
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<br/><br/><label>Subjects--Index Terms: </label>nonlinear diff.equations  Differential equations 
<br/><br/><label>Dewey Class. No.: </label>517.957